84 lines
2.4 KiB
Python
84 lines
2.4 KiB
Python
#!//opt/bin/lv_micropython -i
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import utime as time
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import lvgl as lv
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import display_driver
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from imagetools import get_png_info, open_png
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# Register PNG image decoder
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decoder = lv.img.decoder_create()
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decoder.info_cb = get_png_info
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decoder.open_cb = open_png
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# Create an image from the png file
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try:
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with open('../../assets/img_hand_min.png','rb') as f:
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img_hand_min_data = f.read()
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except:
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print("Could not find img_hand_min.png")
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sys.exit()
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img_hand_min_dsc = lv.img_dsc_t({
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'data_size': len(img_hand_min_data),
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'data': img_hand_min_data
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})
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# Create an image from the png file
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try:
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with open('../../assets/img_hand_hour.png','rb') as f:
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img_hand_hour_data = f.read()
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except:
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print("Could not find img_hand_hour.png")
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sys.exit()
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img_hand_hour_dsc = lv.img_dsc_t({
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'data_size': len(img_hand_hour_data),
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'data': img_hand_hour_data
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})
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def set_value(indic, v):
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meter.set_indicator_value(indic, v)
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#
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# A clock from a meter
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#
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meter = lv.meter(lv.scr_act())
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meter.set_size(220, 220)
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meter.center()
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# Create a scale for the minutes
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# 61 ticks in a 360 degrees range (the last and the first line overlaps)
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scale_min = meter.add_scale()
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meter.set_scale_ticks(scale_min, 61, 1, 10, lv.palette_main(lv.PALETTE.GREY))
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meter.set_scale_range(scale_min, 0, 60, 360, 270)
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# Create another scale for the hours. It's only visual and contains only major ticks
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scale_hour = meter.add_scale()
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meter.set_scale_ticks(scale_hour, 12, 0, 0, lv.palette_main(lv.PALETTE.GREY)) # 12 ticks
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meter.set_scale_major_ticks(scale_hour, 1, 2, 20, lv.color_black(), 10) # Every tick is major
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meter.set_scale_range(scale_hour, 1, 12, 330, 300) # [1..12] values in an almost full circle
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# LV_IMG_DECLARE(img_hand)
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# Add the hands from images
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indic_min = meter.add_needle_img(scale_min, img_hand_min_dsc, 5, 5)
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indic_hour = meter.add_needle_img(scale_min, img_hand_hour_dsc, 5, 5)
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# Create an animation to set the value
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a1 = lv.anim_t()
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a1.init()
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a1.set_values(0, 60)
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a1.set_repeat_count(lv.ANIM_REPEAT.INFINITE)
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a1.set_time(2000) # 2 sec for 1 turn of the minute hand (1 hour)
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a1.set_var(indic_min)
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a1.set_custom_exec_cb(lambda a1,val: set_value(indic_min,val))
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lv.anim_t.start(a1)
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a2 = lv.anim_t()
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a2.init()
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a2.set_var(indic_hour)
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a2.set_time(24000) # 24 sec for 1 turn of the hour hand
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a2.set_values(0, 60)
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a2.set_custom_exec_cb(lambda a2,val: set_value(indic_hour,val))
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lv.anim_t.start(a2)
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